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Review any PDF or set of notes faster with a mind map

Upload lecture slides, textbook chapters, or handwritten notes photographed as images. DeckOwl builds an editable, explorable mind map you can review branch by branch.

Create mind maps nowFree · No credit card required

Drop files here or browsePDF, DOCX, PPTX, text or photos of your notes · several files with Plus

Free account · 3 sets a month · Creates mind maps in seconds

How a mind map review helps you remember more

Before an exam, a mind map review shows the structure of a topic at a glance, so you can see how concepts connect instead of rereading pages in order. Seeing the branches first makes it easier to spot gaps in your notes.

Start with the main branches, then recall the details under each one.
Redraw weak branches from memory a day later to test retention.
Split overloaded branches into separate maps so each review stays focused.
Compare your map with the syllabus to confirm nothing important is missing.

Example cell biology mind map branches for a review

OrganellesMitochondria produce ATP · ribosomes build proteins · Golgi apparatus packages molecules

Cell cycleG1 growth · S phase DNA copying · G2 preparation · M phase division

Membrane transportPassive diffusion · facilitated diffusion · active transport using ATP

Endomembrane systemRough ER makes proteins · smooth ER makes lipids · lysosomes digest waste

MitosisProphase condenses chromosomes · metaphase aligns them · anaphase separates sister chromatids · telophase reforms nuclei

Generate the full set

Reads your files

Works with PDF, DOCX, PPTX, plain text, and photos of pages read with text recognition.

Editable branches

Rename, move, or add nodes so the map matches how your course organizes the material.

Explore at your pace

Collapse and expand branches to quiz yourself on one section before looking at the details.

How it works

Upload your material

Add a lecture deck, a chapter PDF, or typed notes from the week you are reviewing.

Explore the map

Open the generated map and check that the main branches reflect the key ideas in your course.

Review and revise

Cover the sub-points, recall each branch from memory, then edit the map where you were unsure.

Start by covering the sub-points under each branch and trying to name them yourself. Then check the map, mark what you missed, and redraw those branches from memory the next day. Repeating this a few times usually reveals which sections need more time.

Because the map is editable, you can keep it current as your course moves on. Add new lectures as branches, merge duplicates, and expand any section you keep getting wrong.

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Frequently asked questions

How many branches should a mind map review have?

Most topics work well with 4 to 7 main branches, each holding 2 to 4 sub-points. If a branch grows past that, move part of it into its own map so the review stays readable.

How do I review a mind map effectively?

Cover the sub-points and try to recall each branch out loud before checking the map. Spend extra time on the branches you miss, then redraw them from memory after a day or two.

Can I edit the mind map after it is generated?

Yes, you can rename, move, and expand nodes to match your course. Exporting to PDF or other formats is available on the Plus plan.

Is there a free plan?

Yes, the Free plan includes 3 generations per month and studying in the browser. Plus at $99.90/year or $9.99/month adds unlimited generations and exports.

Generate free mind maps

Keep exploring the topic

Review the main ideas visually or practice recalling them.